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論文投稿 Growth and anaerobic digestion characteristics of microalgae cultivated using various types of sewage

作成年度 2014 年度
論文名 Growth and anaerobic digestion characteristics of microalgae cultivated using various types of sewage
論文名(和訳)
論文副題
発表会
誌名 Bioresource Technology
巻・号・回 170
発表年月日 2014/10/01
所属研究室/機関名 著者名(英名)
土木研究所Taira Hidaka
土木研究所Kenichiro Inoue
土木研究所Yutaka Suzuki
土木研究所Jun Tsumori
抄録
Microalgal cultivation combined with anaerobic digestion at wastewater treatment plants is promising to recover energy. This study investigated the growth and anaerobic digestion characteristics of microalgae cultivated using nutrients in sewage. Microalgae were cultivated using primary effluent, secondary effluent, and dewatering filtrate. Microscopic observation indicated that Chlorella was cultivated using dewatering filtrate of anaerobic digestion without controlling the type of species. Batch anaerobic digestion experiments with digested sludge showed that the methane conversion ratio of the cultivated mixture was approximately 40 - 65%. Different cultivation time did not affect the microalgal contents. Methane recovery mass was 0.13 NL-methane/L-cultivation liquor. The C/N ratio of the cultivated mixture was approximately 3 - 5, but the apparent ammonia release ratio was smaller than that of sewage sludge during digestion. These results proved the applicability of methane recovery from microalgae cultivated using nutrients included in anaerobically digested sludge.
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